include/coff/arm.h

   1 /*** coff information for the ARM */
   2
   3 #define COFFARM 1
   4
   5 /********************** FILE HEADER **********************/
   6
   7 struct external_filehdr {
   8         char f_magic[2];        /* magic number                 */
   9         char f_nscns[2];        /* number of sections           */
  10         char f_timdat[4];       /* time & date stamp            */
  11         char f_symptr[4];       /* file pointer to symtab       */
  12         char f_nsyms[4];        /* number of symtab entries     */
  13         char f_opthdr[2];       /* sizeof(optional hdr)         */
  14         char f_flags[2];        /* flags                        */
  15 };
  16
  17 /* Bits for f_flags:
  18  *      F_RELFLG        relocation info stripped from file
  19  *      F_EXEC          file is executable (no unresolved external references)
  20  *      F_LNNO          line numbers stripped from file
  21  *      F_LSYMS         local symbols stripped from file
  22  *      F_INTERWORK     file supports switching between ARM and Thumb instruction sets
  23  *      F_INTERWORK_SET the F_INTERWORK bit is valid
  24  *      F_APCS_FLOAT    code passes float arguments in float registers
  25  *      F_PIC           code is reentrant/position-independent
  26  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  27  *      F_APCS_26       file uses 26 bit ARM Procedure Calling Standard
  28  *      F_APCS_SET      the F_APCS_26, F_APCS_FLOAT and F_PIC bits have been initialised
  29  */
  30
  31 #define F_RELFLG        (0x0001)
  32 #define F_EXEC          (0x0002)
  33 #define F_LNNO          (0x0004)
  34 #define F_LSYMS         (0x0008)
  35 #define F_INTERWORK     (0x0010)
  36 #define F_INTERWORK_SET (0x0020)
  37 #define F_APCS_FLOAT    (0x0040)
  38 #undef  F_AR16WR
  39 #define F_PIC           (0x0080)
  40 #define F_AR32WR        (0x0100)
  41 #define F_APCS_26       (0x0400)
  42 #define F_APCS_SET      (0x0800)
  43
  44 /* Bits stored in flags field of the internal_f structure */
  45
  46 #define F_INTERWORK     (0x0010)
  47 #define F_PIC_INT       (0x0020)
  48 #define F_APCS_FLOAT    (0x0040)
  49 #define F_ARM_ARCHITECTURE_MASK (0x0c00)
  50 #define F_ARM_2         (0x0000)
  51 #define F_ARM_2a        (0x0000)
  52 #define F_ARM_3         (0x0400)
  53 #define F_ARM_3M        (0x0400)
  54 #define F_ARM_4         (0x0800)
  55 #define F_ARM_4T        (0x0c00)
  56 #define F_APCS26        (0x4000)
  57
  58 /*
  59  * ARMMAGIC ought to encoded the procesor type,
  60  * but it is too late to change it now, instead
  61  * the flags field of the internal_f structure
  62  * is used as shown above.
  63  *
  64  * XXX - NC 5/6/97
  65  */
  66
  67 #define ARMMAGIC        0xa00  /* I just made this up */
  68
  69 #define ARMBADMAG(x) (((x).f_magic != ARMMAGIC))
  70
  71 #define FILHDR  struct external_filehdr
  72 #define FILHSZ  20
  73
  74
  75 /********************** AOUT "OPTIONAL HEADER" **********************/
  76
  77
  78 typedef struct
  79 {
  80   char  magic[2];               /* type of file                         */
  81   char  vstamp[2];              /* version stamp                        */
  82   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
  83   char  dsize[4];               /* initialized data "  "                */
  84   char  bsize[4];               /* uninitialized data "   "             */
  85   char  entry[4];               /* entry pt.                            */
  86   char  text_start[4];          /* base of text used for this file */
  87   char  data_start[4];          /* base of data used for this file */
  88
  89
  90 }
  91 AOUTHDR;
  92
  93
  94 #define AOUTSZ 28
  95 #define AOUTHDRSZ 28
  96
  97 #define OMAGIC          0404    /* object files, eg as output */
  98 #define ZMAGIC          0413    /* demand load format, eg normal ld output */
  99 #define STMAGIC         0401    /* target shlib */
 100 #define SHMAGIC         0443    /* host   shlib */
 101
 102
 103 /* define some NT default values */
 104 /*  #define NT_IMAGE_BASE        0x400000 moved to internal.h */
 105 #define NT_SECTION_ALIGNMENT 0x1000
 106 #define NT_FILE_ALIGNMENT    0x200
 107 #define NT_DEF_RESERVE       0x100000
 108 #define NT_DEF_COMMIT        0x1000
 109
 110 /********************** SECTION HEADER **********************/
 111
 112
 113 struct external_scnhdr {
 114         char            s_name[8];      /* section name                 */
 115         char            s_paddr[4];     /* physical address, aliased s_nlib */
 116         char            s_vaddr[4];     /* virtual address              */
 117         char            s_size[4];      /* section size                 */
 118         char            s_scnptr[4];    /* file ptr to raw data for section */
 119         char            s_relptr[4];    /* file ptr to relocation       */
 120         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 121         char            s_nreloc[2];    /* number of relocation entries */
 122         char            s_nlnno[2];     /* number of line number entries*/
 123         char            s_flags[4];     /* flags                        */
 124 };
 125
 126 #define SCNHDR  struct external_scnhdr
 127 #define SCNHSZ  40
 128
 129 /*
 130  * names of "special" sections
 131  */
 132 #define _TEXT   ".text"
 133 #define _DATA   ".data"
 134 #define _BSS    ".bss"
 135 #define _COMMENT ".comment"
 136 #define _LIB ".lib"
 137
 138 /* We use the .rdata section to hold read only data.  */
 139 #define _LIT    ".rdata"
 140
 141 /********************** LINE NUMBERS **********************/
 142
 143 /* 1 line number entry for every "breakpointable" source line in a section.
 144  * Line numbers are grouped on a per function basis; first entry in a function
 145  * grouping will have l_lnno = 0 and in place of physical address will be the
 146  * symbol table index of the function name.
 147  */
 148 struct external_lineno {
 149         union {
 150                 char l_symndx[4];       /* function name symbol index, iff l_lnno == 0*/
 151                 char l_paddr[4];        /* (physical) address of line number    */
 152         } l_addr;
 153         char l_lnno[2]; /* line number          */
 154 };
 155
 156
 157 #define LINENO  struct external_lineno
 158 #define LINESZ  6
 159
 160
 161 /********************** SYMBOLS **********************/
 162
 163 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 164 #define E_FILNMLEN      14      /* # characters in a file name          */
 165 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 166
 167 struct external_syment
 168 {
 169   union {
 170     char e_name[E_SYMNMLEN];
 171     struct {
 172       char e_zeroes[4];
 173       char e_offset[4];
 174     } e;
 175   } e;
 176   char e_value[4];
 177   char e_scnum[2];
 178   char e_type[2];
 179   char e_sclass[1];
 180   char e_numaux[1];
 181 };
 182
 183 #define N_BTMASK        (0xf)
 184 #define N_TMASK         (0x30)
 185 #define N_BTSHFT        (4)
 186 #define N_TSHIFT        (2)
 187
 188 union external_auxent {
 189         struct {
 190                 char x_tagndx[4];       /* str, un, or enum tag indx */
 191                 union {
 192                         struct {
 193                             char  x_lnno[2]; /* declaration line number */
 194                             char  x_size[2]; /* str/union/array size */
 195                         } x_lnsz;
 196                         char x_fsize[4];        /* size of function */
 197                 } x_misc;
 198                 union {
 199                         struct {                /* if ISFCN, tag, or .bb */
 200                             char x_lnnoptr[4];  /* ptr to fcn line # */
 201                             char x_endndx[4];   /* entry ndx past block end */
 202                         } x_fcn;
 203                         struct {                /* if ISARY, up to 4 dimen. */
 204                             char x_dimen[E_DIMNUM][2];
 205                         } x_ary;
 206                 } x_fcnary;
 207                 char x_tvndx[2];                /* tv index */
 208         } x_sym;
 209
 210         union {
 211                 char x_fname[E_FILNMLEN];
 212                 struct {
 213                         char x_zeroes[4];
 214                         char x_offset[4];
 215                 } x_n;
 216         } x_file;
 217
 218         struct {
 219                 char x_scnlen[4];       /* section length */
 220                 char x_nreloc[2];       /* # relocation entries */
 221                 char x_nlinno[2];       /* # line numbers */
 222                 char x_checksum[4];     /* section COMDAT checksum */
 223                 char x_associated[2];   /* COMDAT associated section index */
 224                 char x_comdat[1];       /* COMDAT selection number */
 225         } x_scn;
 226
 227         struct {
 228                 char x_tvfill[4];       /* tv fill value */
 229                 char x_tvlen[2];        /* length of .tv */
 230                 char x_tvran[2][2];     /* tv range */
 231         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 232
 233
 234 };
 235
 236 #define SYMENT  struct external_syment
 237 #define SYMESZ  18
 238 #define AUXENT  union external_auxent
 239 #define AUXESZ  18
 240
 241
 242 #       define _ETEXT   "etext"
 243
 244
 245 /********************** RELOCATION DIRECTIVES **********************/
 246
 247
 248
 249 struct external_reloc {
 250   char r_vaddr[4];
 251   char r_symndx[4];
 252   char r_type[2];
 253   char r_offset[4];
 254 };
 255
 256
 257 #define RELOC struct external_reloc
 258 #define RELSZ 14